P20DF Code: Meaning, Causes, and Symptoms | OBD2 Codes

P20DF – Exhaust Aftertreatment Fuel Pressure Sensor Circuit Low


P20DF Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


P20DF Possible Causes


Faulty Exhaust Aftertreatment Fuel Pressure Sensor,Exhaust Aftertreatment Fuel Pressure Sensor harness is open or shorted,Exhaust Aftertreatment Fuel Pressure Sensor circuit poor electrical connection


P20DF Description


The exhaust fuel addition injector assembly is mounted on the outlet of the turbocharger sub-assembly, and low-pressure fuel is supplied to the exhaust fuel addition injector assembly by the feed pump in the supply pump assembly. The exhaust fuel addition injector assembly adds fuel by a control signal from the Engine Control Module (ECM). This injector is used for two different controls: Particulate Matter (PM) forced regeneration and PM reduction.